Telephone adapter



FIG. 1 is a top perspective view of a telephone adapter in accordance with the present design.

FIG. 2 is a front view thereof.

FIG. 3 is a rear view thereof.

FIG. 4 is a side view thereof.

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines are shown in the views for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a telephone adapter, as shown and described. 